Confidence Intervals - ExampleĮl Hierro is the smallest Canary island and has 8,077 inhabitants of 18 years or over. So basically, a confidence interval tells us how much our sample correlation is likely to differ from the population correlation we're after. of enclosing the parameter -the correlation for the entire population- that we'd like to know.the range of values -0.29 through 0.52.The 95% confidence interval for this correlation Our sample data come up with a correlation of 0.41 and indicate that So let's say we've a sample of 200 people from a population of 100,000. That encloses a parameter with a given likelihood. Confidence Intervals or Statistical Significance?Ī confidence interval is a range of values.Confidence Intervals - How Does it Work?.Simple Introduction to Confidence Intervals By Ruben Geert van den Berg under Statistics A-Z